The do_unassigned_access hook has been deprecated and RISC-V is the last
user of it. Let's instead update the RISC-V implementation to use
do_transaction_failed instead.

After this series I used the 'git grep' regexes in
docs/devel/loads-stores.rst and these are the memory accesses inside
target/riscv:

monitor.c:102:        cpu_physical_memory_read(pte_addr, &pte, ptesize);

cpu_helper.c:262:        target_ulong pte = address_space_ldl(cs->as, pte_addr, attrs, &res);
cpu_helper.c:264:        target_ulong pte = address_space_ldq(cs->as, pte_addr, attrs, &res);

translate.c:782:    ctx->opcode = cpu_ldl_code(env, ctx->base.pc_next);

gdbstub.c:328:        env->fpr[n] = ldq_p(mem_buf); /* always 64-bit */

All of these look safe to me.

Palmer Dabbelt (2):
  RISC-V: Handle bus errors in the page table walker
  RISC-V: Implement cpu_do_transaction_failed

 target/riscv/cpu.c        |  2 +-
 target/riscv/cpu.h        |  7 +++++--
 target/riscv/cpu_helper.c | 23 ++++++++++++++++-------
 3 files changed, 22 insertions(+), 10 deletions(-)

-- 
2.23.0

On 9/17/19 4:22 PM, Alistair Francis wrote:
> Palmer Dabbelt (2):
>   RISC-V: Handle bus errors in the page table walker
>   RISC-V: Implement cpu_do_transaction_failed

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

r~

On Tue, 17 Sep 2019 16:22:56 PDT (-0700), Alistair Francis wrote:
> The do_unassigned_access hook has been deprecated and RISC-V is the last
> user of it. Let's instead update the RISC-V implementation to use
> do_transaction_failed instead.
>
> After this series I used the 'git grep' regexes in
> docs/devel/loads-stores.rst and these are the memory accesses inside
> target/riscv:
>
> monitor.c:102:        cpu_physical_memory_read(pte_addr, &pte, ptesize);
>
> cpu_helper.c:262:        target_ulong pte = address_space_ldl(cs->as, pte_addr, attrs, &res);
> cpu_helper.c:264:        target_ulong pte = address_space_ldq(cs->as, pte_addr, attrs, &res);
>
> translate.c:782:    ctx->opcode = cpu_ldl_code(env, ctx->base.pc_next);
>
> gdbstub.c:328:        env->fpr[n] = ldq_p(mem_buf); /* always 64-bit */
>
> All of these look safe to me.
>
> Palmer Dabbelt (2):
>   RISC-V: Handle bus errors in the page table walker
>   RISC-V: Implement cpu_do_transaction_failed

Can you Reviewed-By these, as they've still got my Author on them?  That way I 
can pull them in :)

>
>  target/riscv/cpu.c        |  2 +-
>  target/riscv/cpu.h        |  7 +++++--
>  target/riscv/cpu_helper.c | 23 ++++++++++++++++-------
>  3 files changed, 22 insertions(+), 10 deletions(-)

On Fri, Sep 20, 2019 at 3:48 PM Palmer Dabbelt <palmer@sifive.com> wrote:
>
> On Tue, 17 Sep 2019 16:22:56 PDT (-0700), Alistair Francis wrote:
> > The do_unassigned_access hook has been deprecated and RISC-V is the last
> > user of it. Let's instead update the RISC-V implementation to use
> > do_transaction_failed instead.
> >
> > After this series I used the 'git grep' regexes in
> > docs/devel/loads-stores.rst and these are the memory accesses inside
> > target/riscv:
> >
> > monitor.c:102:        cpu_physical_memory_read(pte_addr, &pte, ptesize);
> >
> > cpu_helper.c:262:        target_ulong pte = address_space_ldl(cs->as, pte_addr, attrs, &res);
> > cpu_helper.c:264:        target_ulong pte = address_space_ldq(cs->as, pte_addr, attrs, &res);
> >
> > translate.c:782:    ctx->opcode = cpu_ldl_code(env, ctx->base.pc_next);
> >
> > gdbstub.c:328:        env->fpr[n] = ldq_p(mem_buf); /* always 64-bit */
> >
> > All of these look safe to me.
> >
> > Palmer Dabbelt (2):
> >   RISC-V: Handle bus errors in the page table walker
> >   RISC-V: Implement cpu_do_transaction_failed
>
> Can you Reviewed-By these, as they've still got my Author on them?  That way I
> can pull them in :)

Richard and Philippe have both reviewed it, that should be enough. I'm
not sure if I can review it with my SOB as well.

Alistair

>
> >
> >  target/riscv/cpu.c        |  2 +-
> >  target/riscv/cpu.h        |  7 +++++--
> >  target/riscv/cpu_helper.c | 23 ++++++++++++++++-------
> >  3 files changed, 22 insertions(+), 10 deletions(-)